Consumption of fish and long-chain n-3 polyunsaturated fatty acids is associated with reduced risk of colorectal cancer in a large European cohort

Item Type:	Article
Title:	Consumption of fish and long-chain n-3 polyunsaturated fatty acids is associated with reduced risk of colorectal cancer in a large European cohort
Creators Name:	Aglago, E.K. and Huybrechts, I. and Murphy, N. and Casagrande, C. and Nicolas, G. and Pischon, T. and Fedirko, V. and Severi, G. and Boutron-Ruault, M.C. and Fournier, A. and Katzke, V. and Kühn, T. and Olsen, A. and Tjønneland, A. and Dahm, C.C. and Overvad, K. and Lasheras, C. and Agudo, A. and Sánchez, M.J. and Amiano, P. and Huerta, J.M. and Ardanaz, E. and Perez-Cornago, A. and Trichopoulou, A. and Karakatsani, A. and Martimianaki, G. and Palli, D. and Pala, V. and Tumino, R. and Naccarati, A. and Panico, S. and Bueno-de-Mesquita, B. and May, A. and Derksen, J.W.G. and Hellstrand, S. and Ohlsson, B. and Wennberg, M. and Van Guelpen, B. and Skeie, G. and Brustad, M. and Weiderpass, E. and Cross, A.J. and Ward, H. and Riboli, E. and Norat, T. and Chajes, V. and Gunter, M.J.
Abstract:	BACKGROUND & AIMS: There is an unclear association between intake of fish and long-chain n-3 polyunsaturated fatty acids (n-3 LC-PUFAs) and colorectal cancer (CRC). We examined the association between fish consumption, dietary and circulating levels of n-3 LC-PUFAs, and ratio of n-6:n-3 LC-PUFA with CRC using data from the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. METHODS: Dietary intake of fish (total, fatty/oily, lean/white) and n-3 LC-PUFA were estimated by food frequency questionnaires given to 521,324 participants in the EPIC study; among these, 6291 individuals developed CRC (median follow up, 14.9 years). Levels of phospholipid LC-PUFA were measured by gas chromatography in plasma samples from a sub-group of 461 CRC cases and 461 matched individuals without CRC (controls). Multivariable Cox proportional hazards and conditional logistic regression models were used to calculate hazard ratios (HRs) and odds ratios (ORs), respectively, with 95% CIs. RESULTS: Total intake of fish (HR for quintile 5 vs 1, 0.88; 95% CI, 0.80-0.96; P(trend)=.005), fatty fish (HR for quintile 5 vs 1, 0.90; 95% CI, 0.82-0.98; P(trend)=.009), and lean fish (HR for quintile 5 vs 1, 0.91; 95% CI, 0.83-1.00; P(trend)=.016) were inversely associated with CRC incidence. Intake of total n-3 LC-PUFA (HR for quintile 5 vs 1, 0.86; 95% CI, 0.78-0.95; P(trend)=.010) was also associated with reduced risk of CRC, whereas dietary ratio of n-6:n-3 LC-PUFA was associated with increased risk of CRC (HR for quintile 5 vs 1, 1.31; 95% CI, 1.18-1.45; P(trend)<.001). Plasma levels of phospholipid n-3 LC-PUFA was not associated with overall CRC risk, but an inverse trend was observed for proximal compared with distal colon cancer (P(heterogeneity)=.026). CONCLUSIONS: In an analysis of dietary patterns of participants in the EPIC study, we found regular consumption of fish, at recommended levels, to be associated with a lower risk of CRC, possibly through exposure to n-3 LC-PUFA. Levels of n-3 LC-PUFA in plasma were not associated with CRC risk, but there may be differences in risk at different regions of the colon.
Keywords:	Epidemiologic, Seafood, Omega 3, Tumorigenesis, Animals, Fishes
Source:	Clinical Gastroenterology and Hepatology
ISSN:	1542-3565
Publisher:	Elsevier
Volume:	18
Number:	3
Page Range:	654-666
Date:	March 2020
Additional Information:	Copyright © 2020 by the AGA Institute
Official Publication:	https://doi.org/10.1016/j.cgh.2019.06.031
External Fulltext:	View full text on external repository or document server
PubMed:	View item in PubMed

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